This bulb is good stuff! I use 3 of these in my set up and like the color combo and coral colors seem to "pop" (Posted on 8/24/2010)

Review by naldopr

this is the first time I use Giesemann, recommended by other and is the best bulb so far. (Posted on 10/15/2009)

EXTREMELY Blue Review by Bob K

If youre looking for some seriously bright blueish tones in your tank, this bulb will deliver! However, since Im running the Pure Actinics and 14k MHs on my tank, the addition of this bulb was just a bit overkill for me in the blue department. I would compare it to running 20k MHs with Actinics. I would have given it 5 stars but it was just a tad bit too much blue for me. Sorry, just my preference. (Posted on 8/22/2009)

Awesome Bulb. Review by RonR

I use Giesemann bulbs on all of my SPS tanks and have been very impressed with how my corals have been coloring up after I replaced my metal halides with the T5s.
Highly recommended. (Posted on 10/5/2008)

If youre looking for some seriously bright blueish tones in your tank, this bulb will deliver! However, since Im running the Pure Actinics and 14k MHs on my tank, the addition of this bulb was just a bit overkill for me in the blue department. I would compare it to running 20k MHs with Actinics. I would have given it 5 stars but it was just a tad bit too much blue for me. Sorry, just my preference. (Posted on 8/22/2009)

I use Giesemann bulbs on all of my SPS tanks and have been very impressed with how my corals have been coloring up after I replaced my metal halides with the T5s.
Highly recommended. (Posted on 10/5/2008)